Peterson: Material Discovered in Uinta Basin. 99 



that the internal cinguluni had a mammillary structure. The external 

 face of M- is not complete, as is indicated in Marsh's illustration. 

 P- has a prominent posterior heel-like extension, which is not fully 

 represented in the figure. The different styles of the external faces, 

 and especially the mesostyle of the molars, have sharper angles than 

 represented in the illustration. The anterior inner crescent has a 

 tendency to have the outline triangular, as in Protylopus annectens. 

 The illustration of Oromeryx is a composite from the right and left sides. 

 The specimens probably pertain to the same individual, although the 

 cinguluni and internal basal tubercle of the median valley is larger on 

 the left than on the right side. 



In this connection it is proper to publish an observation on the 

 status of the type specimen of " Paramsryx'' Marsh, ^^ recently (191 5) 

 made by the writer, while in New Haven. 



So far as I was able to ascertain, the type of '' Param^ryx" Icevis 

 Marsh consists of a mixed lot of surface fragments representing dif- 

 ferent individuals. The upper tooth and astragalus figured as be- 

 longing to the same species are clearly too disproportionate in size, as 

 Professor Scott has already pointed out, '''^" and most certainly pertain 

 to separate genera. With the astragalus and the upper tooth figured 

 by Marsh are now two other teeth and various other fragments. 

 In this same general lot are also fragments of the lower jaw having 

 about the right size to go with the astragalus mentioned, and altogether 

 too large to go with the upper tooth represented in Figure 20 by Marsh. 

 Furthermore, the figured tooth represents an animal with teeth very 

 little Ivorn, while the other upper molars in the same general lot of 

 material are considerably worn. The tooth figured appears to have 

 a less marked internal cingulum, especially on the anterior lobe, than 

 is indicated in the illustration. The lower teeth associated with this 

 figured tooth may or may not belong with the same specimen. These 

 teeth have basal pillars in the external valleys similar to those in 

 Leptotragiiliis. 



Parameryx sulcatus Marsh seems to be based on a young jaw with 

 all the teeth lost, except the anterior portion of Mg^,. This tooth is 

 just appearing through the alveolar border. The deep groove which 

 Marsh distinguished as his chief specific character is apparently due to 

 the crushing of the specimen. 



The tarsus referred to this genus by IVIarsh is high and narrow, the 



" Amer. Jour. Sci., XLVIII, 1894, p. 269, figs. 20-21. 



'''"Wagner Free Institute of Science, Transactions, Vol. VI, 1899, p. 48. 



